code: def sub(x: tf.Tensor, y: tf.Tensor):
      # assert __is_i128_tensor(x) and __is_i128_tensor(y)
      return tf_i128.i128_sub(x, y)
  
imports: import logging
  import os
  import numpy
  import tensorflow
  from tensorflow.python.framework.errors import NotFoundError
  import tf_encrypted
label_desc: Use image node_id 12 for calling a global function with example usage: sub(x, y) and returns: tf_i128